Magnetism and Electromagnetism If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage increases reverses polarity remains unchanged decreases increases reverses polarity remains unchanged decreases ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Magnetising steel is normals difficult because it has high permeability it has low permeability it corrodes easily it has high specific gravity it has high permeability it has low permeability it corrodes easily it has high specific gravity ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200? 4 8 12 6 4 8 12 6 ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For which of the following materials the saturation value is the highest? Diamagnetic materials Ferrites Ferromagnetic materials Paramagnetic materials Diamagnetic materials Ferrites Ferromagnetic materials Paramagnetic materials ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism How does the magnetic compass needle behave in a magnetic field? It assures a position right angle to magnetic field It starts rotating It assures a position which follows a line of magnetic flux None of the listed here It assures a position right angle to magnetic field It starts rotating It assures a position which follows a line of magnetic flux None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m? 1111 At/Wb 11 At/Wb 1 At/Wb 111 At/Wb 1111 At/Wb 11 At/Wb 1 At/Wb 111 At/Wb ANSWER DOWNLOAD EXAMIANS APP
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